<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>Vue.js wrapper component example (jquery plugin: select2)</title>
    <!-- Delete ".min" for console warnings in development -->
    <script src="../../dist/vue.min.js"></script>
    <script src="https://unpkg.com/jquery"></script>
    <script src="https://unpkg.com/select2@4.0.3"></script>
    <link href="https://unpkg.com/select2@4.0.3/dist/css/select2.min.css" rel="stylesheet">
    <style>
      html, body {
        font: 13px/18px sans-serif;
      }
      select {
        min-width: 300px;
      }
    </style>
  </head>
  <body>

    <div id="el">
    </div>

    <!-- using string template here to work around HTML <option> placement restriction -->
    <script type="text/x-template" id="demo-template">
      <div>
        <p>Selected: {{ selected }}</p>
        <select2 :options="options" v-model="selected">
          <option disabled value="0">Select one</option>
        </select2>
      </div>
    </script>

    <script type="text/x-template" id="select2-template">
      <select>
        <slot></slot>
      </select>
    </script>

    <script>
    Vue.component('select2', {
      props: ['options', 'value'],
      template: '#select2-template',
      mounted: function () {
        var vm = this
        $(this.$el)
          .val(this.value)
          // init select2
          .select2({ data: this.options })
          // emit event on change.
          .on('change', function () {
            vm.$emit('input', this.value)
          })
      },
      watch: {
        value: function (value) {
          // update value
          $(this.$el).val(value).trigger('change')
        },
        options: function (options) {
          // update options
          $(this.$el).select2({ data: options })
        }
      },
      destroyed: function () {
        $(this.$el).off().select2('destroy')
      }
    })

    var vm = new Vue({
      el: '#el',
      template: '#demo-template',
      data: {
        selected: 0,
        options: [
          { id: 1, text: 'Hello' },
          { id: 2, text: 'World' }
        ]
      }
    })
    </script>
  </body>
</html>
